Bunch building mechanism for spinning frames



Nov. 17, 1931. A. SMITH 1,832,745

BUNCH BUILDING MECHANISM FQR SPINNING FRAMES Filed March 8, 1930 5 Sheets-Sheet l INVENTOR.

wag/'04 ATTORNEYS Nov. 17,1931. A. SMITH: 1,832,745

BUNCH BUILDING MECHANISM FOR SPINNING FRAMES Filed March 8. 1930 -15 Sheets-Sheet 2 INVENTOR.

BY I M :135:55;

Nov. 17, 1931. SMITH 1,832,745

BUNCH BUILDING MECHANISM FOR SPINNING FRAMES Filed March 8. 1930 5 Sheets-Sheet 3 INVENTOR.

ATTORNEYS,

Patented Nov. 17, 1931 UNETED STATES PATENT ()FICE I ALLEN SMITH, OF MILLBURY, MASSACHUSETTS, ASSIGNOR TO WHITIN MACHINE WORKS, OF WHITINSVILLE, MASSACHUSETTS, A CORPORATION OF MASSACHU- SETTS BUNCH BUILDING MEGHANISM FOR SPINNING FRAMES Application filed March 8, 1930. Serial No. 434327.

This invention relates to spinning frames and particularly to mechanism for winding a bunch of yarn at the base of a filling bobbin.

It is desirable in the operation of automatic looms that the bobbins be ejected just before the weft or filling becomes exhausted thereon, so that no short ends or partial picks of filling shall appear in the cloth. To permit such operation, a preliminary bunch of yarn is commonly wound before the usual weft winding begins.

It is the object of my invention to provide improved mechanism for thus winding a preliminary bunch of weft on a filling bobbin and for initiating the regular filling traverse after the bunch is wound.

A further object is to provide mechanism by which the usual builder lever and parts all associated therewith are held at rest during the bunch building operation but are antomatically thrown into operation after a predetermined amount of yarn has been wound on the bobbins.

My invention further relates to arrangements and combinations of parts whirh will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a side elevation of parts of a spinning frame embodying my improvements;

Fig. 2 is an end elevation thereof, looking in the direction of the arrow 2 in Fig. 1;

Fig. 3 is a side elevation of certain parts shown in Fig. 1 but in a different position;

Figs. 1 and 5 are detail perspective views of certain parts to be described; and

Fig. 6 is a partial side elevation of a bobbin with a bunch wound thereon.

Referring to the drawings, 1 have shown parts of a spinning frame of the cap type and comprising a frame 10, a creel 11 (Fig. 2) on which spools S of roving are supported, and a plurality of bobbins B supported on a bobbin rail 12. Upright rods 13 are mounted in fixed position on a cap rail 14 and extend up through the bobbins B, with caps 15 afiixed to their upper ends. The bobbins B are rotated by bands 16 from a driving drum 17 (Fig. 2)

and the bobbin rail 12 is mounted on lifter rods 18 which are vertically reciprocated by mechanism to be described.

The yarn Y is drawn around the lower edges of the caps 15 and is wound on the rotating bobbins, the yarn traverse being determined by the vertical reciprocation of the bobbins relative to the fixed caps 15. The roving is drawn from the spools S by upper drawing rolls 20, intermediate drawing rolls 21 and delivery rolls 22. Suitable pressure rollers 23, 24 and 25 hold the yarn in contact with the several drawing rolls 20, 21 and 22.

Builder mechanism of a lifter rod 18 and at the other end to a casting 31 to which a horizontally extending rod 32 is attached. The casting 31 is mounted on or forms a part of sliding block 33, adapted to move parallel to the drum 17 along guideways 34.

One end of a builder screw 35 is rotatably mounted in a bearing 36 projecting up from the sliding block 33, and a nut 37 is mounted on the screw 35 and is also pivotally connected at 38 with a bracket 39 secured on the side of a builder lever 40. lhe lever 10 is mounted on a fixed stud 11 and supports a bracket 42 having a roll 43 mounted thereon. The roll 43 engages one face or edge of an intermediate lever 44, swinging about a fixed pivot 45 and supporting a cam roll 46 engaged by the builder cam 47.

The cam 17 is mounted on a horizontal shaft 18 extending transversely of the spinning frame and provided with a worm wheel 19 engaged by a worm 5O rotatable with a short shaft 51. A gear 52 is mounted on the shaft 51 and is engaged by a pinion 53 (Fig. 2) rotatable with a fast pulley 54:. A loose pulley 55 is mounted alongside the pulley 5 1 l and the pulleys or 55 may be selectively connected to a driving pulley 56 by a belt 57. The pulley 56 is mounted to rotate with the driving drum 17 of the spinning frame.

I thus provide for rotation of the builder til cam 47 in a predetermined speed relation to the rotation of the driving drum 17 and drawing rolls 20, 21 and 22.

The shaft 18 previously described is also provided with a worm (Fig. 2) engaging a worm gear 62 (Fig. 1) mounted on one on l of a short shaft 6-3. A pinion 6% on the other end of the shaft (33 engages an intermediate or idle gear 65 (Fig. 2), which in turn engages a gear 66 mounted to rotate with the builder screw 35.

The gear 66 is preferably mounted on a sleeve 67 slidable but non-rotatable upon the shaft portion (38 of the builder screw 35. The sleeve 67 is provided with a hand wheel 70 by which it may be manually rotated if desired and the sleeve 67 is also provided with an annular groove 71 to receive a latch 72. lVhen it is desired to adjust the builder screw 35 manually, the latch 72 is raised and the sleeve 67 is moved endwise to disengaee the gear 66 from the intermediate (7 By the connections above described the builder screw 35 is normally rotated at slor: speed and in definite speed relation to the revolutions of the builder cam 47. Rotation of the builder screw varies the distance between the sliding block 33 and the builder lever 10 and thus permits the block 33 to move toward the right in 1., thus lowering the bobbin ail 12 and causing the yarn traverse to be shifted progressively upward toward the tips of the bobbins.

For a more detailed description of the operation of the builder mechanism ration ence is made to my prior application Serial No. ll-06.958, filed November 19 It will be noted that the position of the belt 57 on the tight and loose pulleys and 55 determines whether or not the builder mechanism shall. be operated when the drum 17 and bobbins B are rotated. If the belt is on the loose pulley the spinning of the yarn will take place as usual but the yarn will be wound on the bobbins without anv traverse of the bobbins relative to the caps 15.

Control mechanism I will now describe the mechanism by which the belt is shifted to render the builder motion and traversing mechanism operative after a predetermined amount of yarn has been wound on the bobbins.

For this purpose, an irregular worm 75 is mounted on one of the upper drawing roll shafts E20 and is continuously rotated therewith.

A belt shifting fork 76 (Figs. 2 and is slidable on a fixed stud T? and has a rearwardly projecting portion '78 loosely tell by a forked member 79 mounted at the end of a shipper lever 82. l he lever pivoted at 83 and has an upper end port 10H 84 extending adjacent the worm 75. The port1on 8% 1S lunged at 85 to the lever 82 and is free to swing toward the axis of the drawing roll shaft 20. A stop screw 86 2) is provided for limiting the swinging movement of the member 84:.

A collar 87 is mounted on the member and is provided with a stud 88 normally seated in the spiral groove of the worm 75. A stop 89 limits the swinging movement of the shipper lever to the left in Fig. 1, and a disc 90 on the end of the dravai g roll 20 limits swinging movement of the lever in the opposite direction.

1 he method of operation of the belt shipping mechanism is as follows:

When the spinning frame is to be dotted, the frame is stopped with the roll -16 on the point of the cam 43?. The latch 72 is then raised, the gear 66 is diseng god, and the builder screw is rotated to raise the bobbin rail 12 to its extreme upper limit of travel. At the same time, the member 8 1 forming the upper portion of the shipper lever 82 is ii ted out of contactwith the worm Y5 and is swung to the left against the stop 89 as shown in Fig. 1. The gear 66 is then returned to operative position and the spinning frame is started up but with the belt 57 on the loose pulley 55.

As the worm. 75 rotates with he drawing roll shaft 20, the member 84 is graduall swung to the right in Fig. 1 and the fol-lied member 79 at the bottom of the shipper lever 82 is swung to the left. The slott d opening in the member 79 is substant ally wider than the diameter of the stud 78 on the shipper fork and COUSQQUGHtljJ the initial swinging movement of the shipper lever merely takes up the lost motion n the slotted connection between the member 79 and the stud 78.

After the worm 75 has made a predetermined number of revolutions, the stud 88 enters an abruptl sloped portion 92 of the worm 75 and is thrown quickly to the right, shifting the belt 57 to the tight pulley 541. The collar 87 on the shipper lever portion S 1: then drops into the annular space between the'end of the worm '75 and the disc 90, where it is retained during the continued operation of the spinning frame.

The worm 7 5 is so designed that the drawing roll shaft 20 will make the desired number of revolutions before the abrupt portion 92 of the worm is reached and before the builder motion rendered operative. The initial position of the lever portion 84: may be ried by adjusting the stop 89.

l have thus provided an exceedingly simple and reliable attachment for an ordinary bui er motion by which the motion is made entir I inoperative for a predetermined oporation of the spinning mechanism, after which the builder motion is started and operates in the usual. manner. No change whatever is necessary in the construction of the builder motion itself, in which respect my bunch building attachment is superior to many prior devices for this purpose.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is 1. In a spinning frame, spinning mechanism, mechanism to traverse the yarn produced by said spinning mechanism on the bobbin, said mechanism including a builder lever, actuating means for said builder lever, and means to hold said actuating means stationary during a predetermined operation of the spinning mechanism and to thereafter automatically render said actuating means operative after a predetermined amount of yarn has been preliminarily wound on each bobbin.

2. In a spinning frame, spinning mechanism, mechanism to traverse the yarn produced by said spinning mechanism on the bobbins including a builder lever, a builder cam for operating said lever, means to rotate said cam, and means to hold said rotating means stationary for a predetermined operation of the spinning mechanism and to thereafter automatically render said rotating means operative after apredetermined amount of yarn has been preliminarily wound on each bobbin.

3. In a spinning frame, spinning mechanism, mechanism to traverse the yarn produced by said spinning mechanism on the bobbins, said means including a builder cam, means to rotate said cam including tight and loose pulleys and a driving belt, and means to shift said belt to the tight pulley to rotate said builder cam after a predetermined operation of the spinning mechanism.

l. The combination in a spinning frame as set forth in claim 3, in which the belt shifting means includes a shipper fork, a shipper lever, a lost motion connection between said lever and fork, and automatic means to shift said lever at a 'predetermined'point in the operation of the spinning mechanism.

5. The combination in a spinning frame as set forth in claim 3, in which the belt shifting means includes a shipper fork, a shipper lever, a lost motion connection between said lever and fork, and an irregular worm cam engaging the upper end of said shipper lever and effective to shift said lever at a predetermined point in the operation of the spinning mechanism.

In testimony whereof I havehereunto affixedmy signature.

ALLEN SMITH. 

